Central heating not working but Hot water okay

[NigeTracey]

I have a Baxi solo 2PF Central heating boiler controlled by a Honeywell control panel/timer.
I have a problem that heating will not work either when selected to just CH or combined HW/CH as soon as the hot water cylinder has reached the required temperature and the thermostat has "clicked off". If the hot water tank remains below temperature then the heating will work fine.
The pump is situated in the airing cupboard and has been replaced quite recently, the motrized 3 way valve has also been replaced. The pump works as long as hte water in the hot water tank is cooler than the set temp' but once this is acheived then the pump switches it self off and the radiators become cool.
Thermostatic radiator valves are fitted and can be turned to the highest temperature and this does not alter anything.
Can anyone advise where to look next??

 

[Agile]

If the wiring is correct and it was working then the fault would usually lie with the motor valve!

Tony

 

[NigeTracey]

Thanks, quick question. Does the motorised valve send a signal to power up the pump??

 

[bigpkr]

Thanks, quick question. Does the motorised valve send a signal to power up the pump??

The power to the pump comes from the divertor valves end switch when selecting htg mode.

 

[Whitespirit66]

Did this problem start happening after the new valve and pump were fitted. If yes, then it may be a wiring problem.